[PATCH] Implement aarch64 neon instruction class SIMD Bitwise Extract - LLVM

[Tim Northover]

> Sorry, what name do you want to change to? I don't quite understand your
> comments here.

It's the "printNeonUImm8Operand". It seems to be used for all NEON
operands now, not just 8-bit ones. Its distinguishing characteristic
appears to be that it prints in hex rather than anything to do with
NEON, too.

Cheers.

Tim.